Using diskimage-builder your application deployments can be tested easily and deployed quickly. If you are interested in learning how to create custom golden disk images and use them in your CI system and then deployments, you should come to this talk. In OpenStack Deployment (tripleo) we have built a lightweight golden disk image creator called diskimage-builderwhich we use to make testing and deploying OpenStack itself easy and fast. The same tool can be used to prepare golden disk images of any Linux application. I will cover the architecture of diskimage-builder, how to extend it with your own elements and use the resulting images for deploying within an OpenStack cloud.